Nut for valve stems



Nov. 15, 1932. D G. STAFFORD 1,887,963

' NUT FOR VALVE STEMS Filed NOV. 19, 1930 1 IIIIIIIII Patented Nov. 15,1932 DAVID G. STAFFORD, OF VANCOUVER ISLAND, BRITISH COLUMBIA, CANADANUT FOR VALVE STEMS Application filed November 19, 1930,

This invention relates to nuts used on the valve stems of pneumatictires to hold the stem stationary and also to support a dust cap.Usually these nuts are threaded on to the threaded exterior of the valvestem. As the valve stem is of considerable length it takes considerabletime to remove the nut, and the object of my present invention is todevise a nut construction which may be readily removed without thenecessity of going through this long unscrewing operation.

I attain my object by constructing the nut of two halves hingedlyconnected at one side. To retain the nut in place until the dust cap isoff, a ring is slid over the threaded portion of the nut, this ringbeing provided with a series of spring fingers, and a resilient band isplaced around these fingers to cause the latter to hold the parts of thenut in tight engagement with one another.

The construction is hereinafter more specifically described andillustrated in the accompanying drawing in which Fig. 1 is alongitudinal section through part of a rim showing my improved device;

Fig. 2 an elevational view of the valve stem, the nut and securing ringbeing shown in section;

Fig. 3 a plan view of the device; and

Fig. 4 a plan view of the locking ring.

Fig. 5 a plan view of the hinged nut member in open position.

In the drawing, like numenals indicate corresponding parts in thedifferent figures.

1 indicates a wheel felloe, 2 a rim, and 3 a valve stem extendingtherethrough. 4 is a locking nut which is adapted to bear against theinside of the felloe to lock the stem in position. This nut, as usual,is provided with a hexagonal or other shaped portion 5 and a smallerthreaded portion 6 on to which a dust cap 15 is screwed. The nut isdivided longitudinally into two halves, which are hingedly connectedtogether at 7. The nut, between the parts 5 and 6 is preferably providedwith an unthreaded portion 8, on to which is adapted to be slid alocking ring 10. To facilitate the positioning of this ring, Ipreferably make it a loose fit, and to secure the necessary pressure tohold the nut sections in closed Serial No. 496,653, and in CanadaNovember 15, 1930.

position while the dust cap 1s being replaced or removed, I provide thering with a series of spring fingers 11, the spring fingers being shapedto form an annul ar groove 12 in which is received a resilient band 13which is adapted to exert sufficient pressure to cause the springfingers to bear against the parts of the nut.

Preferably the unthreaded portion 8 of the nut is formed with a groovefirst unscrewed. The rin ofii, the resiliency in the 11 permitting thisbeing removing the band 13.

14: into which the 'backsof the spring fingers 11 project under thepressure of the band 1 To remove the device, the dust cap 14. is

g 10 is then pulled band 18 and lingers done without first The nut 4 maythen be opened up and removed. To replace the device, the nut 4 is firsstem, the ring 10 with slipped into place, and screwed into place.

t closed about the its resilient band then the dust cap What I claim asmy invention is:

1. A quick detachable nut comprising a pair of sections, said sectionsbeing internally threaded to receive between them a valve stem and alsoexternally threaded at one end to receive a dust cap; adapted to beslipped and a spring slip ring over the nut sections to hold thesections together, said nut being formed with an annular groove belowthe externally thread-ed portion into which said spring slip ring isadapted to project.

2. A quick detachable pair of sections nut comprising a said sectionsbeing internally threaded to recelve between them a valve stem and alsoexternally threadedat one end to receive a dust cap;

a slip slipped over the nut ring adapted to be sections, said ring beingformed with a plurality of spring fingers to engage the nut sections t 0hold the sections together,- and a resilient band encircling said fin'ers.

igned at Headquarters Vancouver Island,

B. C., this 22d day of October, 1930.

DAVID GIB B STAFFORD.

